Concrete slab structure



1933- J. w. THOMPSON 1,923,645

CONCRETE SLAB STRUCTURE Filed May 28, 1930 3 sheetssheet 1 son Thom F nvv n 'f 'g Aug. 22 1933. J. w. THOMPSON 23,645

CONCRETE SLAB STRUCTURE Filed May 28, 1930 3 Sheets-sheaf, 2

Aug. 22, 1933. J w TH ON 1,923,645

CONCRETE SLAB STRUCTURE Filed May 28, 1950 3 Sheets-Sheet 3 Patented Aug. 22, 1933 PATENT OFFICE CONCRETE SLAB STRUCTURE John William Thompson, Stanmore, near Sydney, New South Wales, Australia Application May 28, 1930, Serial No. 456,647, and in Australia May 28, 1929 8 Claims.

This invention relates to structures erected of precast concrete slabs which include, inner and outer wall slabs or sheets either in the fiat or formed to an angle such as for corners or to other forms such as for intersections of Walls, chimneys and foundations, and the improvements constituting this invention have been specially devised in order to facilitate the erection of structures with such slabs thereby reducing the cost and to ren- 10 der the structures stronger and more durable than those as hitherto erected with or of such slabs.-

The present improvements comprise; the formation and erection of slabs to provide an open and accessible space between meeting edges of slabs wherein the projecting ends of embedded reinforcing members may be united or secured together and such space may be conveniently and effectively filled in; improved precast slabs formed with their edges which are to be joined to other slabs or beams splayed or bevelled or with parts of such edges bevelled where required and having embedded reinforcing and locking members with their ends projecting at the splay, securing and locking said members and the slabs together by welding the meeting or overlapped locking members, and filling in the space formed by the splays with cement mortar, concrete or other suitable material; in a modified arrangement forming the locking members to or with a slot, loop, eye, or hook so that some of butted slabs will overlap or interengage, driving a tapered pin or closing a rivet through said ends and thus securely locking the butted slabs together; forming ties with ends formed likewise and securing them across the cavity between spaced dual walls to the ends of the locking members by said pin; in a further modified arrangement forming the locking members to or with an angle or upturn, emplacing an eyed end of a tie memher upon a meeting pair of such upturns and then forcing same apart; in a further modified arrangement leaving the projecting ends of the reinforcing and locking members of the slabs straight and twisting such overlapped ends of butted slabs together one upon the other end, if desired, thereafter welding the joint; and in a further modified arrangement leaving said ends straight and uniting them by a joining member in the form of a tube with a medial opening or two spaced openings and engaged upon such meeting ends of butted slabs and then welded through said opening or openings thus uniting said ends and the joining member. In this arrangement a tie may be constructed of H formation, the legs to engage upon the locking member ends and the bridge or transverse member to -members in said rabbet; erecting such beams upon the piers with rabbet outward and locking them together in any of the manners before stated; erecting slabs having top and side edges splayed and projecting locking members thereat between the piers and locking them thereto in like manner, and filling in saidspaces between the slabs and piers with cement mortar or concrete; erecting upon an outer course of wall slabs as herein described to about sill height, a

moulding having a longitudinal tongue upon the upper face and a channel in the bottom face to receive the tops of the wall slabs and preferably being of a length to extend the full length of a wall or to a door opening, securing the moulding to the slabs of the inner wall in any of the manners herein stated, and erecting wall slabs. upon said moulding.

If desired the slabs may be formed with one end of tie members embedded therein and the other end projecting and adapted for connection to the projecting ends of reinforcing members in the slabs of a spaced wall.

And in order that the improvements constituting this invention and practical applications thereof will be readily understood the same will now be described with reference to the accompanying drawings in which;

Figure 1 is a fragmentary perspective of a partially erected building with parts constructed arranged and secured according to some embodiments of the improvements,

Figure 2 is a horizontal sectional perspective of a single wall,

Figure 3 is a similar view of spaced dual and tied walls,

Figure 4 is a view similar to Figure 1 showing modified locking means,

Figure 5 is an enlarged perspective of butted and locked slabs,

Figure 6 is a similar view showing further modified locking means,

Figure '7 is a perspective of a foundation pier and supporting beam in relative positions,

Figure 8 is a fragmentary elevation of such pier and beams as locked together,

Figure 9 is a fragmentary elevation of a beam formed with a partially splayed and specially formed end,

Figure 10 is a perspective of a modified form of locking means,

Figure 11 is a perspective of duel walls and further modified locking means, and

Figure 12 is a perspective of weldable locking and tying means.

The slabs 13 which have embedded reinforcing members 14 projecting at each end to form locking members which may be in the form of an eye or loop 15 or hook 16 or upturn 17 or plain 18, and are formed with splayed longitudinal edges 19 or portions only of such edges splayed as at 20 (Figure 5) and part transverse orifices or grooves to form openings 21 at desired longitudinal positions are sidewardly butted and form a space 22 in which the locking members are exposed, a separate tapered pin 23 is then driven or a rivet is closed through the overlapped eyes or loops 15 to draw and lock together the butted slabs notwithstanding slight differences there may be in the lengths of the respective locking members, and thereafter the space 22 is filled with suitable material and smoothed off flush with the obverse of the slabs. The slabs of inner and outer walls are erected so that the space 22 will be formed at the obverse or exposed face of each of spaced dual walls. The dual walls are tied across the cavity by tie members 24 formed with an eye 15 or hook 16 at each end and positioned across the cavity with their stems through said openings 21 and their ends lying upon the overlapped ends of the looking members so that when a tapered pin or rivet is driven or closed through each group of the eyed ends the slabs and walls are locked together. When the reinforcing members 14 are formed with upturned ends 1'7 the tie members are engaged thereon and secured as described with reference to Figure 11.

Moulding slabs 25 are formed with a tongue 25a upon the upper face and a channel 26 in the underface and have the ends of the reinforcing members 14 projecting and formed as before described at each end which need not be splayed, the lengths of said moulding being arranged upon wall slabs (Figure 4) with their ends spaced sufficiently to enable the locking members to be united, whereafter the space is filled in with suitable material.

Supporting piers 27 are formed with selected edges splayed (Figure 1) as and for the purpose stated and have splayed tops 28 and the locking members projecting at the splays at the edges and also at the top. Beams 29 are formed with splayed ends 30 or a partially splayed and ledged end 31 and if desired with a rabbet 32 along one edge and have the locking members projecting at such ends and in said rabbet 32 so that the beams 29 may be erected with and secured to the piers 2'7, and wall slabs as before described and to requisite dimensions may be inserted between the piers 2'7 and be locked thereto and to the beams in manner before described. The top of the piers 27 may be splayed as at 28 at two, three or'four sides according to the positions said piers are to occupy and the beams to be secured thereto.

For erection of door and. window lintels 33 which are formed with splayed ends 3 1 and which ends may be splayed transversely also as are the slabs 13, have the locking members projecting at the splays, and wall slabs 35 for erecting at each side of the opening have a skewback or sloping shoulder or lintel seat 36 formed at the exposed edge and the remainder of the slab to a reduced width as at 37 and at the seat 36 have the projecting locking members so that the ends of the lintels 33 may be locked to the slabs 35 as before described.

In a modified form of locking the butted slabs together (Figures 5, 6 and 12) the reinforcing members project as plain ends 18 either to butt or to overlap, and they are either twisted together (Figure 5) or welded together (Figure 6) invthe space 22 between the slabs, or may have a tube as 38 having opening 39 emplaced upon the opposed ends 18 as the slabs are butted, and said ends and tube are then welded together through the opening 39. A locking and tying member (Figure 12) is formed of a pair of said tubes 38 joined by a cross bar or tube 40.

Instead of the eyed or slotted locking members 15 such members may be in the form ofhooks 16 which slide over and engage each other as in Figure 10 when the slabs are butted, and may have their ends wound about the other, and where required hook ended tie members 36 are emplaced as in Figure 10. A tapered pin 23 is driven or.

a rivet is closed through said overlapped hooks 16 and said tie members 36 where used and the slabs are so locked together and the spaced dual walls are securely tied across the cavity.

In another form (Figure 11) the projecting ends of the reinforcing members 14 have upturns 1'7, and eye ended tie members 24 are placed over the meeting upturns 17 of butted slabs, and then said ends 17 are forced apart to draw and lock the slabs securely together.

I claim;

1. A precast building slab formed with longitudinal edges entirely splayed transversely to form an open space between the vertical edges at the obverse of the slabs when their edges at the" reverse are butted, and embedded reinforcing members projecting from said splayed edges and securable together in said open space.

2. A precast building slab formed with longitudinal edges entirely splayed transversely to form an open space between the vertical edges at the obverse of slabs when their edges at the reverse are butted, and embedded reinforcing members projecting from said splayed edges and weldable together in said open space.

3. A precast building slab formed with longitudinal edges entirely splayed transversely to form an open space between the vertical edges at the obverse of slabs when their edges at the reverse are butted, and embedded reinforcing members projecting from said splayed edges and securable together in said open space, and a filling locatable thereabouts in said open space.

4. In a building structure, slabs having meeting edges entirely splayed transversely and openended locking members projecting at said edges, said slabs butted at their reverse edges forming an open space at their obverse with said members overlapped in said space, and pin-like members passed through the open ends of said look ing members.

5. In a building structure, slabs having meeting edges entirely splayed transversely and openended locking members projecting at said edges, said slabs butted at their reverse edges forming an open space at their obverse with said members overlapped in said open space, pin-like members passed through the open ends of said locking members, and a filling material located in said open space.

6. A precast building slab formed with side edges entirely splayed transversely to form an open space at the obverse of the slabs when their edges at the reverse are butted, and open ended locking members projecting from said edges and adapted to overlap when the slabs are so butted and to be secured together in said open space.

7. In a building structure, precast building slabs having meeting edges entirely splayed transversely and embedded reinforcing and looking members projecting at said edges and arranged to meet in the open space formed at the obverse when the slabs are butted at their reverse edges, means securing said members together in said open space, and a filling material applied about said members in said open space.

8. In a building structure, precast building slabs having meeting edges entirely splayed transversely and embedded reinforcing and locking members projecting at said edges and arranged to overlap in the open space formed at the obverse when the slabs are butted at their reverse edges, means securing said members together in said open space, and a filling material applied about said membersin' said open space.

- JOHN WILLIAM THOMPSON. 

